JP2006177135A - Joint structure for antiseismic reinforcement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To assure a large bearing force of an antiseismic reinforcing member by mounting a movable restraining member on a concrete slab, of which the restraining member bears a horizontal force by the shearing force separately from a joint metal which is not attached to a slab face so that only the shearing force may be mainly applied to the slab face and a column face. <P>SOLUTION: The joint metal 5 for joining the antiseismic reinforcing member 4 like a brace is mounted on an intersecting part of the column 1 and a beam 2. A first joint plate 6 of the joint metal 5 is joined to the column 1 by a fixing means like high-strength bolts 12. A second joint plate 7 is not joined to the concrete slab 3 on the beam. The movable restraining member 14 resisting the horizontal force applied to the non-fixed side and transmitting the force to the concrete slab 3 as the shearing force is fixed to the concrete slab 3 by a fixing means like an adhesive agent 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure for joining a seismic reinforcement member to a structural member.

  A seismic reinforcement method for joining seismic reinforcement members such as braces to the intersections of column beams has been implemented for seismic reinforcement of structures.

  When the structure is a steel frame structure, a joint fitting for joining a seismic reinforcement member such as a brace to a crossing portion of the column beam is joined by field welding.

  In addition, when the structure is a reinforced concrete structure or a steel reinforced concrete structure, since the members for seismic reinforcement were installed, the steel frame was installed.

  In addition to the above, inventions for joining seismic reinforcement members have been made. Japanese Patent Laid-Open No. 10-184031 (hereinafter referred to as “conventional example 1”) discloses a high-strength metal fitting made of a steel plate having a convex cross section for joining a seismic reinforcement member to a column of a reinforced concrete structure or a steel reinforced concrete structure. The structure fixed with a strength fiber sheet is disclosed.

  Japanese Laid-Open Patent Publication No. 10-317684 (hereinafter referred to as “conventional example 2”) discloses a configuration in which a through hole is formed in a beam and an earthquake-resistant reinforcing member is joined by a pin having the through hole inserted therein. .

  Japanese Patent Laid-Open No. 9-279858 (hereinafter referred to as “conventional example 3”) has a structure in which a through hole is formed in a beam and a joining base of a member for seismic reinforcement is fixed with a PC steel rod through the through hole. Is disclosed.

  Japanese Patent Application Laid-Open No. 11-50690 (hereinafter referred to as “conventional example 4”) discloses a configuration in which a joint fitting for joining a seismic reinforcing member to a column beam having a reinforced concrete structure is fixed via an anchor bolt. .

  However, in the case of steel-framed joining by field welding, the welding strength is reduced due to the field welding in an unreasonable posture, and curing around the welding point is necessary for field welding, and the concrete slab is placed on the beam. If it is installed, it will be necessary to remove the chip, and noise will be generated along with the chipping work. Was.

  In the case of a reinforced concrete structure or a steel-framed reinforced concrete structure, installation work of a steel frame in a limited space is required, which causes a problem that the construction period is prolonged.

  Furthermore, in a steel-steel rebar structure, a problem arises that the internal rebar is in the way and a long anchor cannot be constructed.

  In Conventional Example 1, a problem arises in that a high-strength fiber sheet must be used, resulting in high costs.

  In Conventional Example 2, there is a problem that the work range can be applied only up to the adjacent room and with independent columns.

  In Conventional Example 3, the beam is penetrated and joined with a PC steel rod, so drilling work in slab concrete is required, noise and vibration are generated, and the concrete strength against the tension of the PC steel rod is required. Occurs.

  In Conventional Example 4, there is a problem that it cannot be applied unless the concrete thickness is thick.

Conventional methods of attaching braces for seismic reinforcement include steel structures that are joined by on-site welding, and methods of joining braces after installing a steel frame, but both are difficult to implement and have problems such as noise and dust. There is.
Japanese Patent Laid-Open No. 10-184031 Japanese Patent Laid-Open No. 10-318674 JP-A-9-279858 Japanese Patent Laid-Open No. 10-184031

  The present inventor solved the problems of the joint structures for anti-seismic reinforcement of Conventional Examples 1 to 3 with Japanese Patent Application No. 2003-63217 (unpublished), the reinforcement work can be done in a short period of time, the cost is low, and the construction area It was possible to use a space other than the construction area, and a highly durable seismic reinforcement joint structure was proposed.

  In this prior application invention, the problem of noise and dust could be solved, but since the joining bracket is fixedly joined to the slab concrete, the tensile force of the seismic reinforcing member such as braces is applied to the concrete slab via the joining bracket. Since it acts as a tensile force at the same time as the shearing force, this tensile force locally destroys the concrete slab, so a large proof stress could not be secured.

  The present invention solves the above-mentioned problems, and secures a large brace strength by providing a movement restraining member such as a plate that bears a force separately from the joint fitting, without bonding the joint fitting to the concrete slab surface. It is something that can be done.

  In order to achieve the above object, the present invention is configured as follows.

  The first invention is a joint fitting for joining a seismic reinforcement member to an intersection of structural members extending in two different directions, and adhesive, post-construction anchor, high-strength bolt, etc. for one of the structural members It is joined by the fixing means, and the other structural member is not fixed, and the movement restraint that resists the force acting on the joining metal fitting close to or in contact with the end of the non-fixed joining metal fitting The member is provided on the structural member.

  According to a second invention, in the first invention, when the seismic reinforcement member receives a tensile force, the force acting on the non-fixed portion of the joint fitting is transmitted to the structural member via the movement restraining member. It is characterized by that.

  According to a third invention, in the first invention, the non-fixed side fitting is in contact with the structural member at the opposite end where the movement restraining member is disposed, and the seismic reinforcement member exerts compressive force. When received, the force acting on the joint fitting is transmitted to the structural member as a supporting pressure.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the movement restraint member comprises a gusset plate for joining the joint fitting to the member for seismic reinforcement, and a joint plate for joining to each structural member. Is formed of a base plate that is disposed close to or in contact with the tip of the joining plate on the non-fixed side of the joint fitting and is fixed to the structural member with an adhesive.
According to a fifth invention, in the fourth invention, a horizontal force acting on the joint fitting by a tensile force of the seismic reinforcement member is borne by a shearing force applied to the adhesive.

  6th invention is comprised in the 1st-3rd invention by the gusset plate which joins the said joining metal fitting with the member for earthquake-proof reinforcement, and the joining plate for joining to each structural member, The said movement restraint member The base plate is disposed on the lower surface of the joining plate on the non-fixed side of the joining metal fitting, extends from the joining plate distal end side to the intersection base end of the structural member, and is fixed to the structural member via an adhesive, and the base plate And a movement restraining plate provided in the vicinity of the tip of the second bonding plate.

  According to a seventh invention, in the first to sixth inventions, the structural member extending in one direction is a column, the structural member extending in the other direction is a concrete slab on a beam, and the member for seismic reinforcement Is a brace

  In an eighth aspect of the invention, one structural member is a reinforced concrete column according to the sixth aspect, the other structural member is a reinforced concrete beam, and a joint portion by means for fixing a joint fitting is provided on the reinforced concrete beam, A non-fixed portion of the joining metal fitting according to any one of the seventh invention and a movement restraining member that resists a force acting on the non-fixed portion are provided on the reinforced concrete column.

  According to a ninth invention, one structural member is the reinforced concrete column according to the seventh invention, and the other structural member is a reinforced concrete beam, and the non-fixed portion of the joint fitting according to any one of the first to seventh inventions The movement restraining member that resists the force acting on the non-fixed portion is provided on the reinforced concrete column and the reinforced concrete beam.

  According to a tenth aspect of the present invention, a joining bracket for joining two seismic reinforcing members to a linear structural member from different directions is not fixed to the structural member. The structure member is provided with two movement restraining members that are close to or abutting from both ends of the steel plate and resist the force acting on the joint fitting.

  An eleventh aspect of the invention is the tenth aspect of the invention, comprising a gusset plate for joining the joint fitting to a member for seismic reinforcement, and a joint plate for joining to each structural member. The metal plate is disposed close to or in contact with the tip of the joining plate on the non-fixed side of the metal fitting and is fixed to the structural member via an adhesive.

  A twelfth invention is characterized in that, in the eleventh invention, a horizontal force acting on the joint fitting by a tensile force of the seismic reinforcement member is borne by a shearing force applied to the adhesive.

  According to the present invention, by joining the joint fittings arranged on the intersecting members of the two structural members so as to bear one of the structural members with a shearing force, a large tensile force is applied to the slab surface of the structural member. Since it does not act, high proof stress can be secured to the concrete slab, and therefore, it can be efficiently transmitted to the beam of the existing building via a stud connector or the like.

  Furthermore, in steel structures, reinforced concrete structures, and steel reinforced concrete structures, there is no slab concrete demolition work, and seismic reinforcement work can be performed while using the structure, so that the upper and lower floors of the reinforcement work are not affected. In addition, the concrete slab is not required to be scraped, and the concrete is not repaired after scraping. Since no on-site welding joint is used, curing around the weld is unnecessary, and it is possible to reliably join the seismic reinforcement members compared to the conventional technology that has reliable welding strength by on-site welding in an unreasonable posture. High joint structure for seismic reinforcement.

  Regardless of the steel structure, the reinforced concrete structure, or the steel reinforced concrete structure, the size of the gusset plate of the joint fitting is set to have such a rigidity that it can follow the deformation of the structural member at the time of the earthquake. It is possible to prevent the joining metal member from being peeled off from the structural member due to the deformation of the structural member, and to have a highly seismic reinforcement joining structure.

  Embodiments of the present invention will be described below with reference to the drawings.

  Embodiment 1 shown in FIGS. 1 and 2 shows an example in which a concrete slab 3 is placed on a column 1 made of a square steel pipe and an H-shaped steel beam 2 as an example where two structural members intersect. A joint fitting 5 for joining a seismic reinforcement member 4 such as a brace to the intersection of the column 1 and the concrete slab 3 is placed on the first joining plate 6 and the concrete slab 3 joined to the surface of the column 1. And a gusset plate 8 welded in a direction orthogonal to each of the first joining plate 6 and the second joining plate 7. A seismic reinforcement member 4 such as a brace is connected to the gusset plate 8 by a connecting bolt 11 via a splice plate 10.

  Although the 1st joining plate 6 and the pillar 1 of the joining metal fitting 5 are joined by the some high strength volt | bolt 12, the 2nd joining plate 7 is only fixed with respect to the upper surface of the concrete slab 3, and is not fixed. Originally, the joining metal fitting 5 is for transmitting the tensile force acting on the seismic reinforcement member 4 to the beam 2 through the column 1 and the concrete slab 3 in the event of an earthquake or the like. It is necessary to fix to both, and if the second joining plate 7 is merely placed on the concrete slab 3, the tensile force from the seismic reinforcement member 4 is applied to the concrete slab 3 and further to the beam 2 via the beam stud bolt 21. I can't communicate.

  Therefore, in the first embodiment, when the tensile force of the seismic reinforcement member 4 acts on the joint fitting 5, the tensile force acts as a vertical component force in the direction of pulling up the joint fitting 5 and a horizontal component force acting in the lateral direction. The vertical component force is transmitted to the column 1 by fixing the first joining plate 6 to the column 1 with the high-strength bolt 12 while the horizontal component force acting on the second joining plate 7 is By providing a member that resists this to the concrete slab 3, it can be transmitted as an axial force to the beam 2 via the concrete slab 3 and the stud bolt 21 on the beam.

  That is, in the first embodiment, the movement restraining member 14 made of a steel plate is fixed to the upper surface of the concrete slab 3 in proximity to or in contact with the distal end portion 13 of the second joining plate 7. The movement restraining member 14 is a rectangular steel plate having a predetermined thickness and size (area), and is fixed to the upper surface of the concrete slab 3 with an adhesive 15 such as an epoxy resin adhesive. In order to receive the horizontal force acting on the distal end portion 13 of the second joining plate 7 at the end portion 16 of the movement restraining member 14, it is preferable that the end faces of the second joining plate 7 and the movement restraining member 14 are installed at the same level. Since the height is different by the thickness of the adhesive 15, the spacer 17 made of a metal plate is fixed to the lower surface of the end 16 of the movement restraining member 14 as shown in the figure.

  Therefore, a vertical force and a horizontal force act on the first joining plate 6 and the second joining plate 7 of the joint metal fitting 5 due to the tensile force acting on the seismic reinforcement member 4 made of braces or the like during an earthquake, and the vertical force is high. The horizontal force acting on the second joining plate 7 is received by the movement restraining member 14 while being received by the pillar 1 via the first joining plate 6 by the bolt 12 joining, and further, the concrete is passed from the movement restraining member 14 via the adhesive 15. It is transmitted as an axial force to the beam 2 via the slab 3 and the stud bolt 21 on the beam, and is received by the concrete slab 3. Further, a shearing force based on the horizontal force acts on the adhesive 15.

  Further, when a horizontal force is applied to the second joining plate 7, the first joining plate 6 is fixed to the column 1 with the high-strength bolts 12, so that an upward moment with the bolt fixing portion as the center of rotation is increased. 2 Since it acts on the tip portion 13 of the joining plate 7, in order to suppress the upward force, the post-installed anchor 19 that has been placed on the concrete slab 3 passes through the spacer 17 and protrudes from the upper surface of the tip 16 of the movement restraining member 14. In addition, it is fixed by the nut 18.

  The post-installed anchor 19 cuts a hole in the concrete slab 3, and stores, for example, a capsule containing separately two liquid mixture fixability liquids, inserts a bolt to break the capsule, They are a chemical anchor that mixes and solidifies and fixes the bolt to the concrete slab 3, a mechanical anchor that expands the tip with the bolt and fixes it to the concrete slab 3, and the like.

  Therefore, the post-construction anchor 19 can reliably prevent the tip 16 of the movement restraining member 14 from turning up due to the upward force acting on the tip 13 of the second joining plate 7. Further, in order to prevent the distal end 16 of the movement restraining member 14 from bending locally due to an upward force acting on the distal end 16 of the movement restraining member 14, the stiffening rib 20 is provided on the upper surface near the distal end 16 of the movement restraining member 14. Is provided. The height, width, and number of the stiffening ribs 20 are preferably set to ensure rigidity.

  As described above, according to the seismic reinforcement joint structure of the first embodiment, the horizontal force applied to the joint fitting 5 by the tensile force of the seismic reinforcement member 4 can be received by the axial force of the concrete slab 3, and the shearing force of the adhesive 15 Can be received at. Accordingly, the local tensile force does not act on the concrete slab 3 as in the conventional joint structure, and the problem that the concrete slab 3 is damaged can be solved.

  Further, although the compressive force may act on the seismic reinforcement member 4, in the first embodiment, the joint fitting 5 is a structural member (that is, the column 1) at the opposite end where the movement restraining member 14 is disposed. Therefore, when the seismic reinforcement member 4 receives a compressive force, the force acting on the joint fitting 5 can be transmitted to the structural member (column 1) as a supporting pressure.

  3 and 4 show Embodiment 2 of the present invention. In the second embodiment, the movement restraining member 14 is disposed on the lower surface side of the second joining plate 7 that is the non-fixed side of the joining metal fitting 5 and the crossing base of the column beam from the distal end portion 13 side of the joining plate. A base plate 22 that extends to the end and is fixed to the concrete slab 3 via an adhesive 15, and a movement restraint plate that is provided on the upper surface of the base plate 22 and in the vicinity of the distal end portion 13 of the second joining plate 7. 23. Further, in order to prevent the base plate 22 from being lifted by the movement restraint plate 23 that bears the upward moment of the second joining plate 7, a post-installed anchor 19 that protrudes from the upper surface of the base plate 22 in the vicinity of the movement restraint plate 23. A nut 18 is screwed onto the top of the nut. Other configurations are the same as those of the first embodiment.

  According to the second embodiment, the horizontal force acting on the joint fitting 5 can be borne by the axial force of the concrete slab 3 by the tensile force of the seismic reinforcement member 4 as in the first embodiment. Can bear. Therefore, the tensile force of the seismic reinforcement member 4 does not act as a local tensile force on the concrete, and the problem that the concrete slab 3 is damaged can be solved.

  5 and 6 show the third embodiment, FIG. 7 and FIG. 8 show the fourth embodiment, and FIGS. 9 to 11 show the fifth embodiment. Each of Embodiments 3 to 5 shows an example in which the joint structure for seismic reinforcement of Embodiments 1 and 2 is applied to a reinforced concrete structure. In the third and fourth embodiments, a fixed and non-fixed joint structure for the column 1 of the joint fitting 5 and the concrete slab 3 is provided opposite to the first and second embodiments. Further, the non-joining structure of the first embodiment is applied in the third embodiment of FIGS. 5 and 6, and the non-joining structure of the second embodiment is applied in the fourth embodiment of FIGS. 5 and 6.

  That is, in the third embodiment shown in FIGS. 5 and 6, the second joining plate 7 of the joint fitting 5 is joined to the reinforced concrete beam 24 or the concrete slab 3 by the post-installed anchor 26 such as a chemical anchor. Further, the first restraining plate 6 of the joining metal fitting 5 is arranged in a non-fixed manner on the side surface of the reinforced concrete column 25 and the movement restraining member 14 having the same stiffening rib 20 as in the first embodiment is the adhesive 15 with the reinforced concrete column 25. It is joined to.

  According to the third embodiment, the vertical force acting on the joint fitting 5 due to the tensile force of the seismic reinforcement member 4 can be borne by the movement restraining member 14 joined to the reinforced concrete column 25 via the first joint plate 6. Therefore, the local tensile force does not act on the concrete of the reinforced concrete column 25, and the problem that the concrete is damaged can be solved.

  In Embodiment 4 of FIG. 7, FIG. 8, the 2nd joining plate 7 of the joining metal fitting 5 is joined to the reinforced concrete beam 24 or the concrete slab 3 with the post-installation anchors 26, such as a chemical anchor. Moreover, the 1st joining plate 6 of the joining metal fitting 5 is arrange | positioned at the side surface in the reinforced concrete pillar 25 unfixed. That is, the same base plate 22 as that of the second embodiment is disposed on the back surface of the first joining plate 6 and extends from the distal end portion 16 side to the base end of the crossing portion of the column beam and is fixed to the reinforced concrete column 25 via the adhesive 15. A movement restraining plate 23 is provided on the upper surface of the base plate 22 and in the vicinity of the front end portion 16 of the first joining plate 6. Further, in order to prevent the movement restraining plate 23 from receiving a lateral force acting on the first joining plate 6 and thereby applying a force to the base plate 22 in a direction away from the column locally, The nut 18 is screwed onto the tip of the post-installed anchor 19 projecting from the upper surface of the base plate 22.

  According to the fourth embodiment, the vertical force acting on the joint fitting 5 by the tensile force of the seismic reinforcement member 4 can be borne by the movement restraining member 23 joined to the reinforced concrete column 25 via the first joint plate 6. Therefore, the local tensile force does not act on the concrete of the reinforced concrete column 25, and the problem that the concrete is damaged can be solved.

  9 to 11 show the fifth embodiment. In the fifth embodiment, in the reinforced concrete structure composed of the reinforced concrete column 1 and the reinforced concrete beam 24, the fixing means for the joining metal fitting 5 of the seismic reinforcement structure is an unfixed joint structure with respect to both the column 1 and the beam 24. Show. That is, the 1st joining plate 6 and the 2nd joining plate 7 of the joining metal fitting 5 are arrange | positioned non-fixed by the side surface of the reinforced concrete pillar 25, and the upper surface of the concrete slab 3. As shown in FIG. The non-fixed joint structure between the first joint plate 6 and the reinforced concrete column 25 is the same as that of the third embodiment shown in FIG. That is, after the spacer 17 is disposed in contact with or close to the tip of the first bonding plate 6 and the movement restraining member 14 with the reinforcing rib 20 disposed through the adhesive 15 passes through the spacer 17. The construction anchor 19 and the nut 18 are attached to the reinforced concrete column 25. The second joining plate 7 is also in the same manner as described above, and a spacer 17 is disposed in contact with or close to the tip thereof, and the movement restraining member 14 with the reinforcing rib 20 disposed through the adhesive 15 penetrates the spacer 17. The post-construction anchor 19 and the nut 18 are fixed to the concrete slab 3.

  According to the fifth embodiment, a vertical force and a horizontal force act on the first joint plate 6 and the second joint plate 7 of the joint metal fitting 5 due to the tensile force acting on the seismic reinforcement member 4 made of braces or the like during an earthquake. Sometimes, both vertical force and horizontal force are received by the movement restraining member 14 provided on the reinforced concrete column 25 and the concrete slab 3 via the first joining plate 6 and the first joining plate 7 respectively, and the adhesive from the movement restraining member 14. 15 is transmitted as an axial force to the reinforced concrete column 25 and the concrete slab 3 through 15, and a shearing force acts on the adhesive 15 and is received by the reinforced concrete column 25 and the concrete slab 3. Therefore, the local tensile force does not act on the concrete of the reinforced concrete column 25 and the concrete slab 3, and the problem that the concrete is damaged can be solved.

  Next, a sixth embodiment of the joint structure of the seismic reinforcement member to the structural member to which the present invention is applied will be described. In the sixth embodiment, the same components and members as those in the first to fifth embodiments are denoted by the same reference numerals, and the following description is omitted.

  As shown in FIG. 12, the joint structure 41 for seismic reinforcing members as the sixth embodiment is bridged between the pillars 1 raised at a predetermined interval and the pillars 1 standing plurally. In the steel structure 39 composed of the beam 2, the seismic reinforcement member 4 a disposed obliquely downward to the right from the orthogonal point 40 a where the column 1 and the beam 2 are orthogonal to each other, and the orthogonality where the column 1 and the beam 2 are orthogonal to each other. The seismic reinforcement member 4b disposed diagonally downward to the left from the point 40b is joined.

  In the steel structure 39, when the beam 2 is displaced in the L direction shown in FIG. 12 in the event of an earthquake or the like, a tensile force is applied to the seismic reinforcement member 4a. A compressive force is applied to the member 4b. As a result, a force in the P direction is applied to the joint structure 41 by the seismic reinforcing member 4a, and a force in the R direction is applied by the seismic reinforcing member 4b. When the force in the P direction and the force in the R direction are respectively decomposed in the horizontal direction and the vertical direction, the forces in the vertical direction are reversed and cancel each other, so that the horizontal force acts on the joint structure 41. .

  Similarly, in the steel structure 39, when the beam 2 is displaced in the M direction shown in FIG. 12 in the event of an earthquake or the like, a compressive force is applied to the seismic reinforcement member 4a. A tensile force is applied to the seismic reinforcement member 4b. As a result, a force in the Q direction is applied to the joint structure 41 by the seismic reinforcing member 4a, and a force in the S direction is applied by the seismic reinforcing member 4b. As in the case of displacement in the L direction, the force in the vertical direction is canceled out, and the force in the horizontal direction acts on the joint structure 41.

  FIG. 13 shows a detailed configuration of the joint structure 41. The joint structure 41 includes a joint plate 47 placed on the concrete slab 3 and a gusset plate 8 welded in a direction orthogonal to the joint plate 47. The gusset plate 8 is connected to the seismic reinforcing member 4 a via the splice plate 10 by the connecting bolt 11, and the seismic reinforcing member 4 b is connected to the gusset plate 8 via the splice plate 10. Incidentally, the gusset plate 8 is erected in a state where both sides are guided by ribs (not shown).

  The movement restraining member 14 made of a steel plate plate is brought close to or brought into contact with the front end portions 13a and 13b of the joining plate 47, respectively. The movement restraining member 14 is fixed to the upper surface of the concrete slab 3 via an adhesive 15 such as an epoxy resin adhesive.

  That is, the joining plate 47 is in a state in which the movement restraining member 14 is approached or abutted from both ends via the front end portions 13a and 13b and fixed. When a horizontal force is applied to the joining plate 47, an upward moment as described above acts on the distal end of the movement restraining member, so that the construction anchor 19 is moved after being placed on the concrete slab 3 to suppress this. The restraining member 14 is protruded from the upper surface of the tip 16 and fixed with a nut 18.

  When the tensile force P is applied to the joint structure 41 having the above-described configuration through the seismic reinforcement member 4a based on the displacement in the L direction of the beam 2, for example, As shown in FIG. 13, the tensile force P can be decomposed into Px as a component of force in the x direction and Py as a component of force in the y direction. Similarly, when a compressive force R is applied via the seismic reinforcement member 4b based on the displacement of the beam 2 in the L direction, the compressive force R of the joint structure 41 is equal to the force in the x direction. It can be decomposed into Rx as a component and Ry as a component of force in the y direction.

  As a result, Py and Ry loaded on the joint structure 41 cancel each other. Further, Px and Rx loaded on the joint structure 41 strengthen each other. That is, when the beam 2 is displaced in the L direction, a horizontal force obtained by superimposing the Px and Rx acts on the movement restraining member 14 via the tip portion 13a. Since the movement restraining member 14 is fixed to the concrete slab 3 by the adhesive 15, the horizontal force is borne by the shearing force to the slab surface, and flows from the concrete slab 3 as an axial force to the beam through the stud on the beam. Can do.

  Therefore, the local slab 3 is not affected by the local tensile force acting on the concrete slab 3 as in the conventional joint structure, and the problem that the concrete slab 3 is damaged can be solved.

In addition, when the tensile force S is applied to the joint structure 41 having the above-described configuration, for example, based on the displacement in the M direction in the beam 2 via the seismic reinforcement member 4b, the joint structure 41 is provided. As shown in FIG. 13, this tensile force S can be decomposed into a tensile stress Sx as a component of force in the x direction and a tensile stress Sy as a component of force in the y direction. Similarly, when a compressive force Q is applied via the seismic reinforcement member 4a based on the displacement of the beam 2 in the M direction, the compressive force Q in the joint structure 41 is the force in the x direction. It can be decomposed into a compression force Qx as a component and a compression force Qy as a component of the force in the y direction.

  As a result, Sy and Qy loaded on the joint structure 41 cancel each other. In addition, Sx and Qx loaded on the joint structure 41 strengthen each other. That is, when the beam 2 is displaced in the M direction, the horizontal force obtained by superimposing the Sx and Qx acts on the movement restraining member 14 via the tip portion 13b. Since the movement restraining member 14 is fixed to the concrete slab 3 by the adhesive 15, the horizontal force is borne by the shearing force to the slab surface, and flows from the concrete slab 3 as an axial force to the beam through the stud on the beam. Can do.

  Therefore, the local slab 3 is not affected by the local tensile force acting on the concrete slab 3 as in the conventional joint structure, and the problem that the concrete slab 3 is damaged can be solved.

  In addition, when each angle of the seismic reinforcing members 4a and 4b with respect to the concrete slab 3 is the same as each other, it is desirable that each structure of the joint structure 41 be formed so as to be symmetrical with respect to the left and right lines via the straight line V. Further, when the angles of the seismic reinforcement members 4a and 4b with respect to the concrete slab 3 are different from each other, for example, the lengths of the movement restraining members 14 are made different from each other without being formed symmetrically with respect to the left and right lines via the straight line V. You may do it. This is because the magnitude of the shearing force that can be carried by the adhesive 15 can be optimized on both the left and right sides.

  In addition, this Embodiment 6 is not limited to the structure mentioned above, For example, as shown in FIG. 14, the movement restraint member 14 is arrange | positioned on the lower surface side of the joining plate 47, and a concrete slab is passed through the adhesive agent 15. As shown in FIG. 3 and a base plate 22 fixed to the base plate 22 and a movement restraining plate 23 on the upper surface of the base plate 22 and close to the tip portions 13a and 13b of the joining plate 47 may be provided. Details of these configurations are omitted here by citing the description of the second embodiment.

  Also in the configuration shown in FIG. 14, the horizontal force acting on the joint fitting 41 due to the tensile stress or the compressive stress of the seismic reinforcement member 4 can be similarly carried by the shearing force acting on the adhesive 15. Therefore, the tensile force of the seismic reinforcement member 4 does not act as a local force, and it is possible to solve the problem that the concrete slab 3 is damaged.

  In the above-described sixth embodiment, the case where the present invention is applied to the concrete slab 3 placed on the beam 2 in the steel structure 39 has been described as an example. It may be arranged on a linear structural member.

  In the above-described sixth embodiment, the case where the present invention is applied to the steel structure 39 has been described as an example. However, the present invention is not limited to this case, and may be applied to, for example, an RC structure. .

[Operation of the embodiment]
According to the present invention, by joining the joint fittings arranged on the intersecting members of the two structural members so as to bear one of the structural members with a shearing force, a large tensile force is applied to the slab surface of the structural member. Since it does not act, it can transmit efficiently to the stud connector on the beam of the existing building, and high proof stress can be secured to this concrete slab.

  Furthermore, in steel structures, reinforced concrete structures, and steel reinforced concrete structures, there is no slab concrete demolition work, and seismic reinforcement work can be performed while using the structure, so that the upper and lower floors of the reinforcement work are not affected. In addition, it eliminates the need for slabs for concrete slabs, and also eliminates the need for concrete repairs after smashing. Compared to the prior art, which does not use on-site welding joints and has reliable welding strength due to in-situ welding in an unreasonable posture, the seismic reinforcing member can be reliably joined to provide a highly reliable joint structure for earthquake-proof reinforcement.

  Regardless of the steel structure, the reinforced concrete structure, or the steel reinforced concrete structure, the size of the gusset plate of the joint fitting is set to have such a rigidity that it can follow the deformation of the structural member at the time of the earthquake. It is possible to prevent the joining metal member from being peeled off from the structural member due to the deformation of the structural member, and to have a highly seismic reinforcement joining structure.

  Regardless of the steel structure, the reinforced concrete structure, or the steel reinforced concrete structure, the size of the gusset plate of the joint fitting is set to have such a rigidity that it can follow the deformation of the structural member at the time of the earthquake. It is possible to prevent the joining metal member from being peeled off from the structural member due to the deformation of the structural member, and to have a highly seismic reinforcement joining structure.

  In the above-described embodiment, the case where the stud bolt 21 on the beam is provided on the steel beam 2 as an example has been described. However, the present invention is not limited to such a case. Any displacement prevention means may be substituted. In such a case, the description of the stud bolt 21 on the beam is applied as it is to the slip prevention means.

(A) is sectional drawing which shows Embodiment 1 of this invention. (A), (b) is AA sectional drawing and BB sectional drawing of FIG. 1, (c) is CC sectional drawing of Fig.2 (a). It is sectional drawing which shows Embodiment 2 of this invention. (A), (b) is DD sectional drawing and EE sectional drawing of FIG. It is sectional drawing which shows Embodiment 3 of this invention. (A), (b) is FF sectional drawing of FIG. 5, and GG sectional drawing. It is sectional drawing which shows Embodiment 4 of this invention. (A), (b) is HH sectional drawing and II sectional drawing of FIG. It is sectional drawing which shows Embodiment 5 of this invention. It is JJ sectional drawing of FIG. It is KK sectional drawing of FIG. It is a figure which shows the joining structure of the member for earthquake-proof reinforcement as Embodiment 6. FIG. It is a figure for demonstrating about the detail of the joining structure of the member for earthquake-proof reinforcement as Embodiment 6. FIG. It is another figure for demonstrating about the detail of the joining structure of the member for earthquake-proof reinforcement as Embodiment 6. FIG.

Explanation of symbols

1 Column 2 Steel beam 3 Concrete slab 4 Seismic reinforcement member (brace)
5 Joint metal fitting 6 First joint plate 7 Second joint plate 8 Gusset plate 10 Splice plate 11 Connecting bolt 12 High-strength bolt 13 Tip part 14 Movement restraint member 15 Adhesive 16 Tip part 17 Spacer 18 Nut 19 Post-installed anchor 20 Stiffening Rib 21 Stud bolt 22 on beam Base plate 23 Movement restraint plate 24 Reinforced concrete beam 25 Reinforced concrete column 26 Post-installed anchor 39 Steel structure 40 Orthogonal point 41 Joint structure

Claims (12)

  A joint fitting for joining a seismic reinforcement member to an intersection of structural members extending in two different directions is joined to one of the structural members by fixing means such as an adhesive, a post-construction anchor, a high strength bolt, etc. The structural member is provided with a movement restraining member that is not fixed to the other structural member and is close to or in contact with the end portion of the non-fixed-side joint fitting to resist the force acting on the joint fitting. A joint structure for seismic reinforcement characterized by   2. The earthquake resistance according to claim 1, wherein when the seismic reinforcement member receives a tensile force, a force acting on a non-fixed portion of the joint fitting is transmitted to the structural member via the movement restraining member. Reinforced joint structure.   The non-fixed-side joining metal fitting according to claim 1, wherein the non-fixed joining metal fitting is in contact with the structural member at the opposite end where the movement restraining member is disposed, and the seismic reinforcement member receives a compressive force. A joint structure for seismic reinforcement that transmits a force acting on the structure member as a supporting pressure.   The joint fitting is composed of a gusset plate for joining the seismic reinforcement member and a joint plate for joining to each structural member, and the movement restraining member is close to the tip of the joint plate on the non-fixed side of the joint fitting. The seismic reinforcing joint structure according to any one of claims 1 to 3, wherein the joint structure is configured by a base plate disposed in contact with and fixed to a structural member by an adhesive. The joint structure for seismic reinforcement according to claim 4, wherein a horizontal force acting on the joint metal by a tensile force of the seismic reinforcement member is borne by a shearing force applied to the adhesive.   The joint fitting is composed of a gusset plate that joins the seismic reinforcement member, and a joint plate for joining to each structural member, and the movement restraining member is arranged on the lower surface of the joint plate on the non-fixed side of the joint fitting A base plate that extends from the distal end side of the joining plate to the proximal end of the crossing portion of the structural member and is fixed to the structural member via an adhesive; an upper surface of the base plate; and in proximity to the distal end of the second joining plate The joint structure for earthquake-proof reinforcement according to any one of claims 1 to 3, wherein the joint structure is composed of a provided movement restraining plate.   The structural member extending in the one direction is a column, the structural member extending in the other direction is a concrete slab on a beam, and the seismic reinforcement member is a brace. The joint structure for earthquake-proof reinforcement according to any one of the above items.   8. One of the structural members is a reinforced concrete column according to claim 7, the other structural member is a reinforced concrete beam, and a joint portion by a fixing means of a joint fitting is provided on the reinforced concrete beam, A non-fixed portion of the joint metal fitting described above and a movement restraining member that resists a force acting on the non-fixed portion is provided on the reinforced concrete column.   One structural member is a reinforced concrete column according to claim 7, and the other structural member is a reinforced concrete beam, and the non-fixed portion of the joint fitting according to any one of claims 1 to 7, and the non-fixed portion A joint structure for earthquake-proof reinforcement, characterized in that a movement restraining member that resists an acting force is provided on the reinforced concrete column and the reinforced concrete beam.   A joint fitting for joining the two seismic reinforcement members to the linear structural member from different directions is not fixed to the structural member, 2. A joint structure for seismic reinforcement, wherein two structural members that are in contact with each other and resist a force acting on the joint fitting are provided on the structural member. A gusset plate for joining the joint fitting to the member for seismic reinforcement, and a joint plate for joining to each structural member,
The said movement restraining member is fixed to the said structural member through an adhesive agent while being arrange | positioned in proximity | contact or contact | abutting to the front-end | tip of the joining plate of the non-fixed side of a joining metal fitting. Seismic reinforcement joint structure. The joint structure for earthquake-resistant reinforcement according to claim 11, wherein a horizontal force acting on the joint metal by a tensile force of the earthquake-resistant reinforcement member is borne by a shearing force applied to the adhesive.

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